Improved building-brick or hollow block



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GEORGE H. JOHNSON AND GEORGE M'ILSOM, OF BUFFALO, NEW YORK.

Letters Patent No. 86,929, flared Februa/ry y16, '1869.

The Schedule referred to :Lu these Letters Patent and making part/of thesame To all whom'tt may concern: Y, ,Y Q

Be it known` thatWQGEORGE H.JOHNSON, and

GEORGE Mr LspM, of Buffalo, in the county or"- Erie,. and State of NewYork, have invented a new and improved Flanged Brickl or Block; and wedo hereby declare the following. to "be a full and exact'descriptionthereof', reference being had to the accompanying drawings, forming apart of thisspeciiication, in which- Figure 1 is a View in perspectiveof-three of our im'- proved bricks, laid Au ptogetherl v l l y Figure 2,a plan'view of the same.

Figure 3, 'a side elevation, and

Figure 4, an end view thereof.

The nature of our invention consists in the formation of projecting ribsand lips, or ilanges, upon the upper lateral edges of a brick, or block,in such manner as that they may embrace closely the bottom of a lsimilarblock when placed thereon.

Our improved bricks, or blocks, may be moulded of clay, or other plasticmaterial, by hand or machinery, in the usual manner.

VThe moulds are provided with lateral recesseskso formed and arranged asto leave, upon the side edges of one face (which becomes the upper face)of the brick moulded therein, ribs, having a flange projecting upwardlyfrom each, -above the face ofthe block, in a line or plane coincidentwith the sides of the brick.

The lower edges of the Abricks are left square and clean, so as to tclosely between the flanges on the walls, for grain-bins and likestructures.

bricks upon which they are to be laid, as illustrated in y figs.; and 4ofthe drawings.

The Ybricks thus formed may be made solid or hollow, but we contemplatemore especially in our invention the production of improved hollowblocks, adapted particularly to the construction of hollow, ventilatedIn order to impart'additional solidity and strength to walls formed ofour improved flanged hollow bricks,

we contemplate making them of a rhomboidal form, as? illustrated in thedrawings, so that when laid up, as

shown in gs. 1 and 2, they cannot slip, or slideapart,

because of lateral thrust or pressure upon any one A point.

Having thus fully described our invention,

What we claim therein as new, and desire to secure by Letters Patent,is'-l p Abrick, or block, having ribs, with upwardlyprojecting flangesformed upon the side edges of one face thereof, substantially in themanner and for the purpose herein set forth. g

The foregoing specification of our improved hollow brick, or block,signed by us, this 24th day of Novem- GEOQH. JOHNSON.

' GEO. MILSOM.

Witnesses: y

J. O. BAKER, Gno. M. HARVEY.

